During non-flaring times,the radio flux of the Sun at wavelengths of a few centimeters to several tens of centimeters mostly originates from thermal bremsstrahl
In this reported work,we study a major X-class flare(X9.3) that arose from NOAA Active Region(AR) 12673 on 2017 September 6,from 11:53 UT to 12:10 UT in multi-w